Helix Digital Basic System 1000 Proportional Thermostat. This is an extremely simple and easy to use system. Same excellent reliability as the other Helix systems and all temperature setting is done using just one button. New LED display is highly visible from across the room, even at night. All night drop modules can be used with this system. 500 watt system. Features include: 4ft. remote probe, one piece construction, expandable with other Helix night drops devices, temperature settings not affected by power loss, bright LED display and built in fault checking in case the temperature sensor is damaged.